Sylvania console

[DaveWM]

def something wrong, the crt cathodes should be about 175v all are at 220, so I am sure that is why its cut off. The driver transistors have the correct voltages at the base and emitter, but the collectors are also high (the collector connect to the cathodes).

I checked all the voltages from the ps all check fine. I will next get the scope on it and start checking waveforms, starting with the blanking signal.

IF i has an ESR meter I would just shot gun check all the little electros, but my cap tester only checks out of circuit so I would rather narrow it down.

I am going to have to pop for on of those in circuit ESR meters...

[DaveWM]

Really starting to hate this thing

I spent a couple hours checking voltages on the pins of the transistors and the IC's got a couple odd readings (should be 18v is 1.5v) not that that helps any, I mean ok I have odd voltages, now what. the one voltage is on a pin of an ic that I have no way of knowing what to do next. I guess if I had a replacement IC I would pop it in, but alas not like tubes or transistors.

I did check the resistance checks they were ok. argh, how do you guys deal with this stuff.

My last resort will be to check/replace everyone of the little electro caps on the chroma board, but again who knows could be the dumb IC.

[DaveWM]

oh and while testing it did make a pop sound, and what little bit of raster that would show up on the very edges of the crt is gone now. I dont know where the pop sound came from, nor do I see any evidence of blown parts. It was louder than just a HV spark. I still get a flash of light when turning the set off, and can hear the HV come up and there is still a faint raster that can only be seen in complete darkness.